Example usage for android.graphics RectF height

Introduction

In this page you can find the example usage for android.graphics RectF height.

Prototype

public final float height() 

Source Link

Usage

From source file:cn.golden.pinchzoomcanvasview.PinchZoomCanvasViewAttacher.java

private boolean checkMatrixBounds() {
    final ImageView imageView = getImageView();
    if (null == imageView) {
        return false;
    }//  w  ww .j  a va  2 s  .  c  om

    final RectF rect = getDisplayRect(getDrawMatrix());
    if (null == rect) {
        return false;
    }

    final float height = rect.height(), width = rect.width();
    float deltaX = 0, deltaY = 0;

    final int viewHeight = getImageViewHeight(imageView);
    if (height <= viewHeight) {
        switch (mScaleType) {
        case FIT_START:
            deltaY = -rect.top;
            break;
        case FIT_END:
            deltaY = viewHeight - height - rect.top;
            break;
        default:
            deltaY = (viewHeight - height) / 2 - rect.top;
            break;
        }
    } else if (rect.top > 0) {
        deltaY = -rect.top;
    } else if (rect.bottom < viewHeight) {
        deltaY = viewHeight - rect.bottom;
    }

    final int viewWidth = getImageViewWidth(imageView);
    if (width <= viewWidth) {
        switch (mScaleType) {
        case FIT_START:
            deltaX = -rect.left;
            break;
        case FIT_END:
            deltaX = viewWidth - width - rect.left;
            break;
        default:
            deltaX = (viewWidth - width) / 2 - rect.left;
            break;
        }
        mScrollEdge = EDGE_BOTH;
    } else if (rect.left > 0) {
        mScrollEdge = EDGE_LEFT;
        deltaX = -rect.left;
    } else if (rect.right < viewWidth) {
        deltaX = viewWidth - rect.right;
        mScrollEdge = EDGE_RIGHT;
    } else {
        mScrollEdge = EDGE_NONE;
    }
    // Finally actually translate the matrix
    mSuppMatrix.postTranslate(deltaX, deltaY);
    return true;
}

---

From source file:baizhuan.hangzhou.com.gankcopy.view.customview.photoview.PhotoViewAttacher.java

private boolean checkMatrixBounds() {
    final ImageView imageView = getImageView();
    if (null == imageView) {
        return false;
    }//from   ww w  .  j  av  a 2 s .c  o m

    final RectF rect = getDisplayRect(getDrawMatrix());
    if (null == rect) {
        return false;
    }

    final float height = rect.height(), width = rect.width();
    float deltaX = 0, deltaY = 0;

    final int viewHeight = getImageViewHeight(imageView);
    if (height <= viewHeight) {
        switch (mScaleType) {
        case FIT_START:
            deltaY = -rect.top;
            break;
        case FIT_END:
            deltaY = viewHeight - height - rect.top;
            break;
        default:
            deltaY = (viewHeight - height) / 2 - rect.top;
            break;
        }
    } else if (rect.top > 0) {
        deltaY = -rect.top;
    } else if (rect.bottom < viewHeight) {
        deltaY = viewHeight - rect.bottom;
    }

    final int viewWidth = getImageViewWidth(imageView);
    if (width <= viewWidth) {
        switch (mScaleType) {
        case FIT_START:
            deltaX = -rect.left;
            break;
        case FIT_END:
            deltaX = viewWidth - width - rect.left;
            break;
        default:
            deltaX = (viewWidth - width) / 2 - rect.left;
            break;
        }
        mScrollEdge = EDGE_BOTH;
    } else if (rect.left > 0) {
        mScrollEdge = EDGE_LEFT;
        deltaX = -rect.left;
    } else if (rect.right < viewWidth) {
        deltaX = viewWidth - rect.right;
        mScrollEdge = EDGE_RIGHT;
    } else {
        mScrollEdge = EDGE_NONE;
    }

    // Finally actually translate the matrix
    mSuppMatrix.postTranslate(deltaX, deltaY);
    return true;
}

---

From source file:com.guodong.sun.guodong.widget.ZoomImageView.java

/**
 * ?/*from w w  w. j a  v  a 2s  .c o  m*/
 */
private void checkBorderAndCenterWhenScale() {

    RectF rectF = getMatrixRectF();

    float delatX = 0;
    float delatY = 0;

    int width = getWidth();
    int height = getHeight();

    // 
    if (rectF.width() >= width) {

        if (rectF.left > 0) {
            delatX = -rectF.left;
        }

        if (rectF.right < width) {
            delatX = width - rectF.right;
        }
    }

    if (rectF.height() >= height) {

        if (rectF.top > 0) {
            delatY = -rectF.top;
        }

        if (rectF.bottom < height) {
            delatY = height - rectF.bottom;
        }
    }

    // ?
    if (rectF.width() < width) {
        delatX = width * 0.5f - rectF.right + rectF.width() * 0.5f;
    }

    if (rectF.height() < height) {
        delatY = height * 0.5f - rectF.bottom + rectF.height() * 0.5f;
    }

    mScaleMatrix.postTranslate(delatX, delatY);

}

---

From source file:com.mooc.viewpage_photoview_circleindicator.photoview.PhotoViewAttacher.java

/**
 * drawable?/*from  ww w.  ja  v a2  s . c  om*/
 *
 * @return
 */
private boolean checkMatrixBounds() {
    final ImageView imageView = getImageView();
    if (null == imageView) {
        return false;
    }

    //?drawable
    final RectF rect = getDisplayRect(getDrawMatrix());
    if (null == rect) {
        return false;
    }

    final float height = rect.height(), width = rect.width();
    float deltaX = 0, deltaY = 0;

    final int viewHeight = getImageViewHeight(imageView);
    if (height <= viewHeight) {
        switch (mScaleType) {
        case FIT_START:
            deltaY = -rect.top;
            break;
        case FIT_END:
            deltaY = viewHeight - height - rect.top;
            break;
        default:
            deltaY = (viewHeight - height) / 2 - rect.top;
            break;
        }
    } else if (rect.top > 0) {
        deltaY = -rect.top;
    } else if (rect.bottom < viewHeight) {
        deltaY = viewHeight - rect.bottom;
    }

    final int viewWidth = getImageViewWidth(imageView);
    if (width <= viewWidth) {
        switch (mScaleType) {
        case FIT_START:
            deltaX = -rect.left;
            break;
        case FIT_END:
            deltaX = viewWidth - width - rect.left;
            break;
        default:
            deltaX = (viewWidth - width) / 2 - rect.left;
            break;
        }
        mScrollEdge = EDGE_BOTH;
    } else if (rect.left > 0) {
        mScrollEdge = EDGE_LEFT;
        deltaX = -rect.left;
    } else if (rect.right < viewWidth) {
        deltaX = viewWidth - rect.right;
        mScrollEdge = EDGE_RIGHT;
    } else {
        mScrollEdge = EDGE_NONE;
    }

    // Finally actually translate the matrix
    mSuppMatrix.postTranslate(deltaX, deltaY);
    return true;
}

---

From source file:org.getlantern.firetweet.fragment.support.AccountsDashboardFragment.java

private void onAccountSelected(AccountProfileImageViewHolder holder, final ParcelableAccount account) {
    if (mSwitchAccountAnimationPlaying)
        return;//from w  w w  . j  a va  2  s .c  o  m
    final ImageView snapshotView = mFloatingProfileImageSnapshotView;
    final ShapedImageView profileImageView = mAccountProfileImageView;
    final ShapedImageView clickedImageView = holder.getIconView();

    // Reset snapshot view position
    snapshotView.setPivotX(0);
    snapshotView.setPivotY(0);
    snapshotView.setTranslationX(0);
    snapshotView.setTranslationY(0);

    final Matrix matrix = new Matrix();
    final RectF sourceBounds = new RectF(), destBounds = new RectF(), snapshotBounds = new RectF();
    getLocationOnScreen(clickedImageView, sourceBounds);
    getLocationOnScreen(profileImageView, destBounds);
    getLocationOnScreen(snapshotView, snapshotBounds);
    final float finalScale = destBounds.width() / sourceBounds.width();
    final Bitmap snapshotBitmap = TransitionUtils.createViewBitmap(clickedImageView, matrix,
            new RectF(0, 0, sourceBounds.width(), sourceBounds.height()));
    final ViewGroup.LayoutParams lp = snapshotView.getLayoutParams();
    lp.width = clickedImageView.getWidth();
    lp.height = clickedImageView.getHeight();
    snapshotView.setLayoutParams(lp);
    // Copied from MaterialNavigationDrawer: https://github.com/madcyph3r/AdvancedMaterialDrawer/
    AnimatorSet set = new AnimatorSet();
    set.play(ObjectAnimator.ofFloat(snapshotView, View.TRANSLATION_X, sourceBounds.left - snapshotBounds.left,
            destBounds.left - snapshotBounds.left))
            .with(ObjectAnimator.ofFloat(snapshotView, View.TRANSLATION_Y,
                    sourceBounds.top - snapshotBounds.top, destBounds.top - snapshotBounds.top))
            .with(ObjectAnimator.ofFloat(snapshotView, View.SCALE_X, 1, finalScale))
            .with(ObjectAnimator.ofFloat(snapshotView, View.SCALE_Y, 1, finalScale))
            .with(ObjectAnimator.ofFloat(profileImageView, View.ALPHA, 1, 0))
            .with(ObjectAnimator.ofFloat(clickedImageView, View.SCALE_X, 0, 1))
            .with(ObjectAnimator.ofFloat(clickedImageView, View.SCALE_Y, 0, 1));
    final long animationTransition = 400;
    set.setDuration(animationTransition);
    set.setInterpolator(new DecelerateInterpolator());
    set.addListener(new AnimatorListener() {

        private Drawable clickedDrawable;
        private int[] clickedColors;

        @Override
        public void onAnimationStart(Animator animation) {
            snapshotView.setVisibility(View.VISIBLE);
            snapshotView.setImageBitmap(snapshotBitmap);
            final Drawable profileDrawable = profileImageView.getDrawable();
            clickedDrawable = clickedImageView.getDrawable();
            clickedColors = clickedImageView.getBorderColors();
            final ParcelableAccount oldSelectedAccount = mAccountsAdapter.getSelectedAccount();
            mImageLoader.displayDashboardProfileImage(clickedImageView, oldSelectedAccount.profile_image_url,
                    profileDrawable);
            //                mImageLoader.displayDashboardProfileImage(profileImageView,
            //                        account.profile_image_url, clickedDrawable);
            clickedImageView.setBorderColors(profileImageView.getBorderColors());
            mSwitchAccountAnimationPlaying = true;
        }

        @Override
        public void onAnimationEnd(Animator animation) {
            finishAnimation();
        }

        private void finishAnimation() {
            final Editor editor = mPreferences.edit();
            editor.putLong(KEY_DEFAULT_ACCOUNT_ID, account.account_id);
            editor.apply();
            mAccountsAdapter.setSelectedAccountId(account.account_id);
            mAccountOptionsAdapter.setSelectedAccount(account);
            updateAccountOptionsSeparatorLabel(clickedDrawable);
            snapshotView.setVisibility(View.INVISIBLE);
            snapshotView.setImageDrawable(null);
            profileImageView.setImageDrawable(clickedDrawable);
            profileImageView.setBorderColors(clickedColors);
            profileImageView.setAlpha(1f);
            clickedImageView.setScaleX(1);
            clickedImageView.setScaleY(1);
            clickedImageView.setAlpha(1f);
            mSwitchAccountAnimationPlaying = false;
        }

        @Override
        public void onAnimationCancel(Animator animation) {
            finishAnimation();
        }

        @Override
        public void onAnimationRepeat(Animator animation) {

        }
    });
    set.start();
}

---

From source file:com.github.chrisbanes.photoview.PhotoViewAttacher.java

public PhotoViewAttacher(ImageView imageView) {
    mImageView = imageView;/*from w  ww  .  j  a  va 2 s.  co  m*/
    imageView.setOnTouchListener(this);
    imageView.addOnLayoutChangeListener(this);

    if (imageView.isInEditMode()) {
        return;
    }

    mBaseRotation = 0.0f;

    // Create Gesture Detectors...
    mScaleDragDetector = new CustomGestureDetector(imageView.getContext(), this);

    mGestureDetector = new GestureDetector(imageView.getContext(),
            new GestureDetector.SimpleOnGestureListener() {

                // forward long click listener
                @Override
                public void onLongPress(MotionEvent e) {
                    if (mLongClickListener != null) {
                        mLongClickListener.onLongClick(mImageView);
                    }
                }

                @Override
                public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
                    if (mSingleFlingListener != null) {
                        if (getScale() > DEFAULT_MIN_SCALE) {
                            return false;
                        }

                        if (MotionEventCompat.getPointerCount(e1) > SINGLE_TOUCH
                                || MotionEventCompat.getPointerCount(e2) > SINGLE_TOUCH) {
                            return false;
                        }

                        return mSingleFlingListener.onFling(e1, e2, velocityX, velocityY);
                    }
                    return false;
                }
            });

    mGestureDetector.setOnDoubleTapListener(new GestureDetector.OnDoubleTapListener() {
        @Override
        public boolean onSingleTapConfirmed(MotionEvent e) {
            if (mOnClickListener != null) {
                mOnClickListener.onClick(mImageView);
            }
            final RectF displayRect = getDisplayRect();

            final float x = e.getX(), y = e.getY();

            if (mViewTapListener != null) {
                mViewTapListener.onViewTap(mImageView, x, y);
            }

            if (displayRect != null) {

                // Check to see if the user tapped on the photo
                if (displayRect.contains(x, y)) {

                    float xResult = (x - displayRect.left) / displayRect.width();
                    float yResult = (y - displayRect.top) / displayRect.height();

                    if (mPhotoTapListener != null) {
                        mPhotoTapListener.onPhotoTap(mImageView, xResult, yResult);
                    }
                    return true;
                } else {
                    if (mOutsidePhotoTapListener != null) {
                        mOutsidePhotoTapListener.onOutsidePhotoTap(mImageView);
                    }
                }
            }
            return false;
        }

        @Override
        public boolean onDoubleTap(MotionEvent ev) {
            try {
                float scale = getScale();
                float x = ev.getX();
                float y = ev.getY();

                if (scale < getMediumScale()) {
                    setScale(getMediumScale(), x, y, true);
                } else if (scale >= getMediumScale() && scale < getMaximumScale()) {
                    setScale(getMaximumScale(), x, y, true);
                } else {
                    setScale(getMinimumScale(), x, y, true);
                }
            } catch (ArrayIndexOutOfBoundsException e) {
                // Can sometimes happen when getX() and getY() is called
            }

            return true;
        }

        @Override
        public boolean onDoubleTapEvent(MotionEvent e) {
            // Wait for the confirmed onDoubleTap() instead
            return false;
        }
    });
}

---

From source file:org.mariotaku.twidere.fragment.support.AccountsDashboardFragment.java

private void onAccountSelected(AccountProfileImageViewHolder holder, final ParcelableAccount account) {
    if (mSwitchAccountAnimationPlaying)
        return;// www  .  j a  va 2s  .  co  m
    final ImageView snapshotView = mFloatingProfileImageSnapshotView;
    final ShapedImageView profileImageView = mAccountProfileImageView;
    final ShapedImageView clickedImageView = holder.getIconView();

    // Reset snapshot view position
    snapshotView.setPivotX(0);
    snapshotView.setPivotY(0);
    snapshotView.setTranslationX(0);
    snapshotView.setTranslationY(0);

    final Matrix matrix = new Matrix();
    final RectF sourceBounds = new RectF(), destBounds = new RectF(), snapshotBounds = new RectF();
    getLocationOnScreen(clickedImageView, sourceBounds);
    getLocationOnScreen(profileImageView, destBounds);
    getLocationOnScreen(snapshotView, snapshotBounds);
    final float finalScale = destBounds.width() / sourceBounds.width();
    final Bitmap snapshotBitmap = TransitionUtils.createViewBitmap(clickedImageView, matrix,
            new RectF(0, 0, sourceBounds.width(), sourceBounds.height()));
    final ViewGroup.LayoutParams lp = snapshotView.getLayoutParams();
    lp.width = clickedImageView.getWidth();
    lp.height = clickedImageView.getHeight();
    snapshotView.setLayoutParams(lp);
    // Copied from MaterialNavigationDrawer: https://github.com/madcyph3r/AdvancedMaterialDrawer/
    AnimatorSet set = new AnimatorSet();
    set.play(ObjectAnimator.ofFloat(snapshotView, View.TRANSLATION_X, sourceBounds.left - snapshotBounds.left,
            destBounds.left - snapshotBounds.left))
            .with(ObjectAnimator.ofFloat(snapshotView, View.TRANSLATION_Y,
                    sourceBounds.top - snapshotBounds.top, destBounds.top - snapshotBounds.top))
            .with(ObjectAnimator.ofFloat(snapshotView, View.SCALE_X, 1, finalScale))
            .with(ObjectAnimator.ofFloat(snapshotView, View.SCALE_Y, 1, finalScale))
            .with(ObjectAnimator.ofFloat(profileImageView, View.ALPHA, 1, 0))
            .with(ObjectAnimator.ofFloat(clickedImageView, View.SCALE_X, 0, 1))
            .with(ObjectAnimator.ofFloat(clickedImageView, View.SCALE_Y, 0, 1));
    final long animationTransition = 400;
    set.setDuration(animationTransition);
    set.setInterpolator(new DecelerateInterpolator());
    set.addListener(new AnimatorListener() {

        private Drawable clickedDrawable;
        private int[] clickedColors;

        @Override
        public void onAnimationStart(Animator animation) {
            snapshotView.setVisibility(View.VISIBLE);
            snapshotView.setImageBitmap(snapshotBitmap);
            final Drawable profileDrawable = profileImageView.getDrawable();
            clickedDrawable = clickedImageView.getDrawable();
            clickedColors = clickedImageView.getBorderColors();
            final ParcelableAccount oldSelectedAccount = mAccountsAdapter.getSelectedAccount();
            mImageLoader.displayDashboardProfileImage(clickedImageView, oldSelectedAccount.profile_image_url,
                    profileDrawable);
            //                mImageLoader.displayDashboardProfileImage(profileImageView,
            //                        account.profile_image_url, clickedDrawable);
            clickedImageView.setBorderColors(profileImageView.getBorderColors());
            mSwitchAccountAnimationPlaying = true;
        }

        @Override
        public void onAnimationEnd(Animator animation) {
            finishAnimation();
        }

        @Override
        public void onAnimationCancel(Animator animation) {
            finishAnimation();
        }

        @Override
        public void onAnimationRepeat(Animator animation) {

        }

        private void finishAnimation() {
            final Editor editor = mPreferences.edit();
            editor.putLong(KEY_DEFAULT_ACCOUNT_ID, account.account_id);
            editor.apply();
            mAccountsAdapter.setSelectedAccountId(account.account_id);
            mAccountOptionsAdapter.setSelectedAccount(account);
            updateAccountOptionsSeparatorLabel(clickedDrawable);
            snapshotView.setVisibility(View.INVISIBLE);
            snapshotView.setImageDrawable(null);
            profileImageView.setImageDrawable(clickedDrawable);
            profileImageView.setBorderColors(clickedColors);
            profileImageView.setAlpha(1f);
            clickedImageView.setScaleX(1);
            clickedImageView.setScaleY(1);
            clickedImageView.setAlpha(1f);
            mSwitchAccountAnimationPlaying = false;
        }
    });
    set.start();
}

---

From source file:org.getlantern.firetweet.view.ShapedImageView.java

private void drawBorder(@NonNull final Canvas canvas, @NonNull final RectF dest) {
    if (mBorderColors == null)
        return;//from  w ww  . j a va2s  . c om
    final RectF transitionSrc = mTransitionSource, transitionDst = mTransitionDestination;
    final float strokeWidth;
    if (transitionSrc != null && transitionDst != null) {
        final float progress = 1
                - (dest.width() - transitionDst.width()) / (transitionSrc.width() - transitionDst.width());
        strokeWidth = mStrokeWidth * progress;
        mBorderPaint.setAlpha(Math.round(mBorderAlpha * progress));
        ViewCompat.setTranslationZ(this, -ViewCompat.getElevation(this) * (1 - progress));
    } else {
        strokeWidth = mStrokeWidth;
        mBorderPaint.setAlpha(mBorderAlpha);
        ViewCompat.setTranslationZ(this, 0);
    }
    mBorderPaint.setStrokeWidth(strokeWidth);
    if (getStyle() == SHAPE_CIRCLE) {
        final float circleRadius = Math.min(dest.width(), dest.height()) / 2f - strokeWidth / 2;
        canvas.drawCircle(dest.centerX(), dest.centerY(), circleRadius, mBorderPaint);
    } else {
        final float radius = getCalculatedCornerRadius();
        final float inset = mStrokeWidth / 2;
        dest.inset(inset, inset);
        canvas.drawRoundRect(dest, radius, radius, mBorderPaint);
        dest.inset(-inset, -inset);
    }
}

---

From source file:com.frank.protean.photoview.PhotoViewAttacher.java

public PhotoViewAttacher(ImageView imageView) {
    mImageView = imageView;/*  w  ww.j  a va 2s . c  o  m*/
    imageView.setOnTouchListener(this);
    imageView.addOnLayoutChangeListener(this);

    if (imageView.isInEditMode()) {
        return;
    }

    mBaseRotation = 0.0f;

    // Create Gesture Detectors...
    mScaleDragDetector = new CustomGestureDetector(imageView.getContext(), onGestureListener);

    mGestureDetector = new GestureDetector(imageView.getContext(),
            new GestureDetector.SimpleOnGestureListener() {

                // forward long click listener
                @Override
                public void onLongPress(MotionEvent e) {
                    if (mLongClickListener != null) {
                        mLongClickListener.onLongClick(mImageView);
                    }
                }

                @Override
                public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
                    if (mSingleFlingListener != null) {
                        if (getScale() > DEFAULT_MIN_SCALE) {
                            return false;
                        }

                        if (MotionEventCompat.getPointerCount(e1) > SINGLE_TOUCH
                                || MotionEventCompat.getPointerCount(e2) > SINGLE_TOUCH) {
                            return false;
                        }

                        return mSingleFlingListener.onFling(e1, e2, velocityX, velocityY);
                    }
                    return false;
                }
            });

    mGestureDetector.setOnDoubleTapListener(new GestureDetector.OnDoubleTapListener() {
        @Override
        public boolean onSingleTapConfirmed(MotionEvent e) {
            if (mOnClickListener != null) {
                mOnClickListener.onClick(mImageView);
            }
            final RectF displayRect = getDisplayRect();

            final float x = e.getX(), y = e.getY();

            if (mViewTapListener != null) {
                mViewTapListener.onViewTap(mImageView, x, y);
            }

            if (displayRect != null) {

                // Check to see if the user tapped on the photo
                if (displayRect.contains(x, y)) {

                    float xResult = (x - displayRect.left) / displayRect.width();
                    float yResult = (y - displayRect.top) / displayRect.height();

                    if (mPhotoTapListener != null) {
                        mPhotoTapListener.onPhotoTap(mImageView, xResult, yResult);
                    }
                    return true;
                } else {
                    if (mOutsidePhotoTapListener != null) {
                        mOutsidePhotoTapListener.onOutsidePhotoTap(mImageView);
                    }
                }
            }
            return false;
        }

        @Override
        public boolean onDoubleTap(MotionEvent ev) {
            try {
                float scale = getScale();
                float x = ev.getX();
                float y = ev.getY();

                if (scale < getMediumScale()) {
                    setScale(getMediumScale(), x, y, true);
                } else if (scale >= getMediumScale() && scale < getMaximumScale()) {
                    setScale(getMaximumScale(), x, y, true);
                } else {
                    setScale(getMinimumScale(), x, y, true);
                }
            } catch (ArrayIndexOutOfBoundsException e) {
                // Can sometimes happen when getX() and getY() is called
            }

            return true;
        }

        @Override
        public boolean onDoubleTapEvent(MotionEvent e) {
            // Wait for the confirmed onDoubleTap() instead
            return false;
        }
    });
}

---

From source file:com.huyn.demogroup.zoomageview.view.PhotoViewAttacher.java

public PhotoViewAttacher(ImageView imageView) {
    mImageView = imageView;/*from  w  w  w. ja v a2s  .  com*/
    View parent = (View) mImageView.getParent();
    parent.setOnTouchListener(this);
    parent.addOnLayoutChangeListener(this);

    if (imageView.isInEditMode()) {
        return;
    }

    mBaseRotation = 0.0f;

    // Create Gesture Detectors...
    mScaleDragDetector = new CustomGestureDetector(imageView.getContext(), this);

    mGestureDetector = new GestureDetector(imageView.getContext(),
            new GestureDetector.SimpleOnGestureListener() {

                // forward long click listener
                @Override
                public void onLongPress(MotionEvent e) {
                    if (mLongClickListener != null) {
                        mLongClickListener.onLongClick(mImageView);
                    }
                }

                @Override
                public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
                    if (mSingleFlingListener != null) {
                        if (getScale() > DEFAULT_MIN_SCALE) {
                            return false;
                        }

                        if (MotionEventCompat.getPointerCount(e1) > SINGLE_TOUCH
                                || MotionEventCompat.getPointerCount(e2) > SINGLE_TOUCH) {
                            return false;
                        }

                        return mSingleFlingListener.onFling(e1, e2, velocityX, velocityY);
                    }
                    return false;
                }
            });

    mGestureDetector.setOnDoubleTapListener(new GestureDetector.OnDoubleTapListener() {
        @Override
        public boolean onSingleTapConfirmed(MotionEvent e) {
            if (mIsDragging) {
                return false;
            }
            if (mOnClickListener != null) {
                mOnClickListener.onClick(mImageView);
            }
            final RectF displayRect = getDisplayRect();

            if (displayRect != null) {
                final float x = e.getX(), y = e.getY();

                // Check to see if the user tapped on the photo
                if (displayRect.contains(x, y)) {

                    float xResult = (x - displayRect.left) / displayRect.width();
                    float yResult = (y - displayRect.top) / displayRect.height();

                    if (mPhotoTapListener != null) {
                        mPhotoTapListener.onPhotoTap(mImageView, xResult, yResult);
                    }
                    return true;
                } else {
                    if (mOutsidePhotoTapListener != null) {
                        mOutsidePhotoTapListener.onOutsidePhotoTap(mImageView);
                    }
                }
            }
            return false;
        }

        @Override
        public boolean onDoubleTap(MotionEvent ev) {
            try {
                float scale = getScale();
                float x = ev.getX();
                float y = ev.getY();

                if (scale < getMediumScale()) {
                    setScale(getMediumScale(), x, y, true);
                } else if (scale >= getMediumScale() && scale < getMaximumScale()) {
                    setScale(getMaximumScale(), x, y, true);
                } else {
                    setScale(getMinimumScale(), x, y, true);
                }
            } catch (ArrayIndexOutOfBoundsException e) {
                // Can sometimes happen when getX() and getY() is called
            }

            return true;
        }

        @Override
        public boolean onDoubleTapEvent(MotionEvent e) {
            // Wait for the confirmed onDoubleTap() instead
            return false;
        }
    });
}

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